Burkert Type 8681 - Manual (Page 75)

75
Service Mode / Manual Control
17. serViCe MOde / Manual COnTrOl
By default, the control head provides the following (e.g. for service purposes):
a magnetic manual control that is easily accessible from the outside for Solenoid Valve 1 (2/A1), as well as •
a mechanical manual control accessible when the hood is open on each equipped solenoid valve. •
17.1. Magnetic Manual Control
Magnetic
Manual Control
Markings for
magnetic
manual control
Fig. 29: Manual control on the basis of encoded magnetic fields
Irrespective of the signal of the higher-level control, the magnetic manual control sets the output of Solenoid Valve
1 electrically to an ON signal and, if control pressure is present, thereby switches the 2/A1 output.
However, if the output of solenoid valve 1 is activated by the control (ON signal), this switching state
cannot be set to an OFF signal with the manual control!
The activation of the manual control is signaled by an illuminated LED display in the fault color: "Blinking pat-
terns": 50 ms ON, 450 ms OFF.
The "blinking pattern" 100 ms ON, 100 ms OFF (3x) in the fault color signals that the manual control function was
disabled by software - the magnetic manual control does not function in this case!
(see chapter
16.2. Blinking Pattern & Fault Signaling)
caution!
When the electrical manual control (valve location 1) is activated:
the peripheral fault bit will be set for the AS interface design; •
the mode is switched to "Manual control active" for the DeviceNet design and can be read out; •
the feedback signals (positions 1-3, external initiator) function as per normal operation. •
Always observe the safety guidelines and the system states!
english
Control Head Type 8681